BananaN00b

I have similar issues, not only was I over watering, some millipedes burrowed inside the corm of my main banana. My solution was to separate the mother and clone, to double my chances of banana survival. Millipedes are good for the garden, but inside a potted plant they eat the roots when the soil is trying in between watering. You might want to take it outside when it's warm but stay away from dirt in case unwanted millipedes crawl in and infest the pot.